JP2022548486A - 流路封止構造、袋状容器及びその製造方法 - Google Patents
流路封止構造、袋状容器及びその製造方法 Download PDFInfo
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Abstract
Description
本実施形態に係る流路封止構造10は、一対の樹脂シート12、14を重ね合わせて溶着した流路16の途上に設けられており、樹脂シート12、14によって流路16と一体的に形成されている。流路封止構造10は、流路16を弱シール部24で開封可能に封じており、初期状態において流路16を封止した状態に保つ。流路封止構造10は、一方又は両方の流路16を介して加圧した流体を流路封止構造10に送り込むことで開封できる。このような流路封止構造10は、例えば、薬液バッグや、血液バッグシステム等の流路に用いられる。
以下では、種々の寸法の流路封止構造10を作成し、第2の溶着工程の加熱条件とシール強度との関係を調べた結果について説明する。ここでは、拡幅部20の直径(幅)を様々に変化させ、第2の溶着工程の供給電力(加熱入力)を20~70Wの範囲で変化させた際の弱シール部24のシール強度の評価を行った。弱シール部24のシール強度は、一方の流路16から流体を供給して弱シール部24が破断する際の圧力(開封圧力:open pressure)を求めることにより評価した。なお、本実施形態の流路封止構造10の適切な開封圧力は、下限が0.1MPa程度、上限が0.2MPa程度の範囲に入るものを適切なものとして評価した。開封圧力が0.1MPa付近を下回ると、シール強度が不足し始め、取り扱い中の意図しない負荷が作用した場合に、容易に開通してしまうおそれがある。また、開封圧力が0.2MPa付近を上回ると、作業者が加圧しても開通しにくくなり、取り扱い性が低下する。
本実施形態の袋状容器40は、図7に示すように、本体部41と、本体部41に連通する流路16と、流路16の途上に設けられた流路封止構造10と、を備えている。袋状容器40は、例えば薬液等を収容する医療用容器であり、流路16は袋状容器40に液体を導入し、又は液体を排出するために用いられる。袋状容器40において、本体部41、流路16及び流路封止構造10は、一対の樹脂シート12、14により一体的に形成されている。なお、図1Aの流路16及び流路封止構造10と同様の構造については、同一の符号を付してその詳細な説明は省略する。
本実施形態では、図7に示す流路封止構造10の開封方法、及び袋状容器40からの流体の移送方法について説明する。なお、以下の説明において図7の袋状容器40と同様の構成については同一符号を付してその詳細な説明は省略する。本実施形態の方法は、図10Aに示す移送装置60を用いて行われる。移送装置60は、例えば、採血装置や、遠心分離装置の一部を構成する装置であり、セットされた袋状容器40の流路封止構造10を開封して、収容部42に収容された流体を移送できる。
本実施形態では、製剤用又は輸血用の血液の採取及び分離等に用いられる血液バッグシステム70について説明する。なお、図1Aの流路封止構造10と同様の構成については、同一符号を付してその詳細な説明は省略する。
本実施形態では、図12Aに示すように、袋状容器40Aのサンプル採取構造110に流路封止構造10を適用した例について説明する。なお、図1Aの流路封止構造10及び図7の袋状容器40と同様の構成については、同一の符号を付してその詳細な説明は省略する。
上記の実施形態では、流路封止構造10の拡幅部20が、平面視して円形の形状に形成されたものを例に説明したが、実施形態はこれに限定されるものではない。例えば、図13に示すように、平面視して矩形の形状に形成された拡幅部20Aとしてもよい。この拡幅部20Aは、流路方向の寸法が幅方向の寸法よりも長く伸びた長方形状に形成されており、その流路方向の中央部に、弱シール部24が幅方向に延びて形成されている。流路封止構造10に本実施形態の拡幅部20Aを適用しても、同様の効果が得られる。
Claims (25)
- 重ね合わされた一対の樹脂シート(12、14)を溶着して形成された流路(16)の途上に設けられる流路封止構造(10)であって、
周囲を前記一対の樹脂シートを溶着してなる拡幅シール部(22)で囲まれ、一端及び他端が前記流路に連通するとともに、前記流路よりも拡幅して形成された拡幅部(20)と、
前記拡幅部に幅方向に延びて形成され、前記拡幅部を前記一端側の第1領域(20a)と前記他端側の第2領域(20b)とに液密及び気密に仕切るとともに、前記拡幅部の内圧の増加によって開通可能な弱シール部(24)と、を備える、流路封止構造。 - 請求項1記載の流路封止構造であって、前記弱シール部は、前記一対の樹脂シートの界面(25)が残った状態で溶着されている、流路封止構造。
- 請求項1又は2記載の流路封止構造であって、前記弱シール部を構成する前記樹脂シートの材質が、前記拡幅シール部を構成する前記樹脂シートの材質と異なる、流路封止構造。
- 請求項1~3のいずれか1項に記載の流路封止構造であって、前記弱シール部は前記幅方向に垂直な方向の寸法が、前記幅方向の中央に向かうにしたがって小さくなるように湾曲して形成されている、流路封止構造。
- 請求項1~4のいずれか1項に記載の流路封止構造であって、前記拡幅部は、平面視して円形状に形成されている、流路封止構造。
- 請求項1~5のいずれか1項に記載の流路封止構造であって、前記一対の樹脂シートは、前記拡幅部において厚み方向に離間して膨らんでいる、流路封止構造。
- 重ね合わされた一対の樹脂シートを溶着した周縁シール部(44)と、前記周縁シール部に囲まれた収容部(42)と、前記一対の樹脂シートが溶着されて形成されてなり前記収容部に連通した流路と、前記流路の途上に設けられた流路封止構造と、を有する袋状容器(40)であって、
前記流路封止構造は、
周囲を前記一対の樹脂シートを溶着してなる拡幅シール部で囲まれ、一端及び他端が前記流路に連通するとともに、前記流路よりも拡幅して形成された拡幅部と、
前記拡幅部に幅方向に延びて形成され、前記拡幅部を前記一端側の第1領域と前記他端側の第2領域とに液密及び気密に仕切るとともに、前記拡幅部の内圧の増加によって開通可能な弱シール部と、を有する、袋状容器。 - 請求項7記載の袋状容器であって、前記弱シール部が、前記一対の樹脂シートの界面が残った状態で溶着されている、袋状容器。
- 請求項7記載の袋状容器であって、前記弱シール部を構成する前記樹脂シートの材質が、前記拡幅シール部を構成する前記樹脂シートの材質と異なる、袋状容器。
- 請求項7~9のいずれか1項に記載の袋状容器であって、前記弱シール部は前記幅方向に垂直な方向の寸法が、前記幅方向の中央に向かうにしたがって小さくなるように湾曲して形成されている、袋状容器。
- 請求項7~10のいずれか1項に記載の袋状容器であって、前記拡幅部は、平面視して円形状に形成されている、袋状容器。
- 請求項7~11のいずれか1項に記載の袋状容器であって、前記一対の樹脂シートは、前記拡幅部において厚み方向に離間して膨らんでいる、袋状容器。
- 請求項7~12のいずれか1項に記載の袋状容器であって、前記弱シール部の厚さ方向への離間を阻止する開封阻止部材(50)を備えた、袋状容器。
- 一対の樹脂シートを厚さ方向に重ね合わせる工程と、
前記一対の樹脂シートを溶着して、流路と、前記流路の途上に設けられ前記流路よりも拡幅して形成された拡幅部とを形成する第1の溶着工程と、
前記拡幅部の前記樹脂シートを溶着して、幅方向に横断する弱シール部を形成する第2の溶着工程と、を有し、
前記第2の溶着工程は、前記第1の溶着工程よりも面積当たりの入力熱量が少ない条件で溶着を行う、流路封止構造の製造方法。 - 請求項14記載の流路封止構造の製造方法であって、前記弱シール部は、前記樹脂シートの界面を残して密着している、流路封止構造の製造方法。
- 請求項14記載の流路封止構造の製造方法であって、前記弱シール部を構成する前記樹脂シートの材質が、前記拡幅シール部を構成する前記樹脂シートの材質と異なる、流路封止構造の製造方法。
- 弱シール部が形成される部分が異なる材質で形成された一対の樹脂シートを厚さ方向に重ね合わせる工程と、
前記一対の樹脂シートを溶着して、流路と、前記流路の途上に設けられ前記流路よりも拡幅して形成された拡幅部とを形成すると溶着工程と、
前記拡幅部の前記樹脂シートを溶着して、幅方向に横断する弱シール部を形成する溶着工程と、を同時に行う、流路封止構造の製造方法。 - 一対の樹脂シートを厚さ方向に重ね合わせる工程と、
前記一対の樹脂シートを溶着して、収容部と、流路と、前記流路の途上に設けられ前記流路よりも拡幅して形成された拡幅部とを形成する第1の溶着工程と、
前記拡幅部の前記樹脂シートを溶着して、幅方向に横断する弱シール部を形成する第2の溶着工程と、を有し、
前記第2の溶着工程は、前記第1の溶着工程よりも面積当たりの入力熱量が少ない条件で溶着を行う、袋状容器の製造方法。 - 請求項18記載の袋状容器の製造方法であって、前記弱シール部は前記樹脂シートの界面を残して溶着されている、袋状容器の製造方法。
- 請求項18又は19に記載の袋状容器の製造方法であって、さらに、前記第2の溶着工程の後に、前記収容部、前記流路及び前記拡幅部を加熱滅菌する工程を有し、前記加熱滅菌する工程は、前記弱シール部に、前記弱シール部の厚さ方向の離間を阻止する開封阻止部材を装着して行う、袋状容器の製造方法。
- 弱シール部が形成される部分が異なる材質で形成された一対の樹脂シートを厚さ方向に重ね合わせる工程と、
前記一対の樹脂シートを溶着して、収容部と、流路と、前記流路の途上に設けられ前記流路よりも拡幅して形成された拡幅部とを形成する第1の溶着工程と、
前記拡幅部の前記樹脂シートを溶着して、幅方向に横断する弱シール部を形成する第2の溶着工程と、を有し、
前記第2の溶着工程は、前記第1の溶着工程と同時に行う、袋状容器の製造方法。 - 重ね合わされた一対の樹脂シートを溶着して形成された流路の途上に設けられる流路封止構造であって、周囲を前記一対の樹脂シートを溶着してなる拡幅シール部で囲まれ、一端及び他端が前記流路に連通するとともに、前記流路よりも拡幅して形成された拡幅部と、前記拡幅部に幅方向に延びて形成され、前記拡幅部を前記一端側の第1領域と前記他端側の第2領域とに液密及び気密に仕切るとともに、前記拡幅部の内圧の増加によって開通可能な弱シール部と、を備える流路封止構造の開封方法であって、
前記流路にポンプ(56)を接続する工程と、
前記ポンプを通じて前記拡幅部に加圧した流体を送り込み、前記弱シール部を構成する前記一対の樹脂シートを離間させる工程と、
を有する、流路封止構造の開封方法。 - 重ね合わされた一対の樹脂シートを溶着した周縁シール部と、前記周縁シール部に囲まれた収容部と、前記一対の樹脂シートが溶着されて形成されてなり前記収容部に連通した流路と、前記流路の途上に設けられた流路封止構造と、を有する袋状容器であって、前記流路封止構造は、周囲を前記一対の樹脂シートを溶着してなる拡幅シール部で囲まれ、一端及び他端が前記流路に連通するとともに、前記流路よりも拡幅して形成された拡幅部と、前記拡幅部に幅方向に延びて形成され、前記拡幅部を前記一端側の第1領域と前記他端側の第2領域とに液密及び気密に仕切るとともに、前記拡幅部の内圧の増加によって開通可能な弱シール部と、を有する袋状容器から流体を移送する移送方法であって、
前記流路にポンプを接続する工程と、
前記ポンプを通じて前記流路封止構造及び前記収容部に向けて加圧された流体を送り込み、前記流路封止構造の前記弱シール部を構成する前記一対の樹脂シートを離間させる工程と、
前記ポンプを逆転させて前記収容部の流体を前記収容部から流出させる工程と、
を有する、移送方法。 - 全血を採取する採血バッグ(72)と、
前記全血の遠心分離が行われる親バッグ(74)と、
分離された血液成分の一部を収容する子バッグ(76)と、
前記血液成分の保存液を収容した薬液バッグ(78)と、
前記採血バッグと前記親バッグとを接続する第1流路(80)と、
前記親バッグと、前記子バッグと、前記薬液バッグとを接続する第2流路(82)と、
を有し、前記採血バッグ、前記親バッグ、前記子バッグ、前記薬液バッグ、前記第1流路及び前記第2流路が一対の樹脂シートを溶着して一体的に形成された血液バッグシステム(70)であって、
前記第1流路及び前記第2流路の経路の少なくとも一か所に設けられた流路封止構造を備え、前記流路封止構造は、
周囲を前記一対の樹脂シートを溶着してなる拡幅シール部で囲まれ、一端及び他端が前記第1流路又は前記第2流路に連通するとともに、前記流路よりも拡幅して形成された拡幅部と、
前記拡幅部に幅方向に延びて形成され、前記拡幅部を前記一端側の第1領域と前記他端側の第2領域とに液密及び気密に仕切るとともに、前記拡幅部の内圧の増加によって開通可能な弱シール部と、を有する、
血液バッグシステム。 - 内部に収容部(42)が形成された袋状容器(40A)に接続され、前記収容部に連通した流路(116)と、前記流路を介して前記袋状容器に接続されたサンプル容器(114)と、前記流路の途上に設けられ前記流路を封止する流路封止構造と、を備え、前記流路、前記サンプル容器及び前記流路封止構造が、一対の樹脂シートを溶着して前記袋状容器と一体的に形成された、袋状容器のサンプル採取構造(110)であって、
前記流路封止構造は、
周囲を前記一対の樹脂シートを溶着してなる拡幅シール部で囲まれ、一端及び他端が前記流路に連通するとともに、前記流路よりも拡幅して形成された拡幅部と、
前記拡幅部に幅方向に延びて形成され、前記拡幅部を前記一端側の第1領域と前記他端側の第2領域とに液密及び気密に仕切るとともに、前記拡幅部の内圧の増加によって開通可能な弱シール部と、を有する、
サンプル採取構造。
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